// /src/pages/hot/hot.vue
<script setup lang="ts">
import {ref,defineProps,onMounted} from 'vue'
import {getHotRecommendAPI} from '@/services/hot'
import type { SubTypeItem } from '@/types/hot'
// 热门推荐页 标题和url
const hotMap = [
  { type: '1', title: '特惠推荐', url: '/hot/preference' },
  { type: '2', title: '爆款推荐', url: '/hot/inVogue' },
  { type: '3', title: '一站买全', url: '/hot/oneStop' },
  { type: '4', title: '新鲜好物', url: '/hot/new' },
]

// 接受路由参数
const query = defineProps<{
  type:string
}>()

// 通过页面参数选中当前type对象
const curryHapMap = hotMap.find((v=>{
  return v.type === query.type
}))

// 设置页面标题
uni.setNavigationBarTitle({title:curryHapMap!.title})

// 默认高亮的下标
const activeIndex = ref(0)  
const subTabs = ref<(SubTypeItem&{finish?:boolean})[]>([])
const bannerPic = ref('')
// 获取数据 
const getHotRecommend = async()=>{
  const res = await getHotRecommendAPI(curryHapMap!.url,{
    page: import.meta.env.DEV ? 30 : 1,
    pageSize:10
  })
  bannerPic.value = res.result.bannerPicture
  subTabs.value = res.result.subTypes
}
 
// 滚动到底部重新加载数据
const onscrolltolower =async ()=>{
  // 获取当前选项
  const currySub = subTabs.value[activeIndex.value]
  // 判断是否已经最多了
  if(currySub.goodsItems.page < currySub.goodsItems.pages){
    // 当前页码累加
    currySub.goodsItems.page++
  }else{
    // 标记已结束
    currySub.finish = true
    return uni.showToast({
      icon:'none',
      title:'没有更多数据了～'
    })
  }

  // 调用API
  const res = await getHotRecommendAPI(curryHapMap!.url,{
    // 当前tabId 
    subType: currySub.id,
    page:currySub.goodsItems.page,
    // page:30,
    pageSize:currySub.goodsItems.pageSize
  })
  // 保存
  const newSubType = res.result.subTypes[activeIndex.value]
  // 数组追加
  currySub.goodsItems.items.push(...newSubType.goodsItems.items)
  
}
onMounted(()=>{
  getHotRecommend() 
})
</script>

<template>
  <view class="viewport">
    <!-- 推荐封面图 -->
    <view class="cover">
      <image
        :src="bannerPic"
      ></image>
    </view>
    <!-- 推荐选项 -->
    <view class="tabs">
      <text class="text" 
      :class="{active : index === activeIndex}" 
      v-for="(item,index) in subTabs" 
      @tap="activeIndex=index"
      :key="item.id">{{ item.title}}</text>
    </view>
    <!-- 推荐列表 -->
    <scroll-view 
    @scrolltolower="onscrolltolower"
    v-for="(item,index) in subTabs" 
      :key="item.id"
     v-show="index === activeIndex"
     scroll-y class="scroll-view">
      <view class="goods">
        <navigator
          hover-class="none"
          class="navigator"
          v-for="goods in item.goodsItems.items"
          :key="goods.id"
          :url="`/pages/goods/goods?id=`"
        >
          <image
            class="thumb"
            :src="goods.picture"
          ></image>
          <view class="name ellipsis">{{ goods.name }}</view>
          <view class="price">
            <text class="symbol">¥</text>
            <text class="number">{{ goods.price }}</text>
          </view>
        </navigator>
      </view>
      <view class="loading-text">{{ item.finish ? '没有更多数据了～' : '正在加载...'}}</view>
    </scroll-view>
  </view>
</template>

<style lang="scss">
page {
  height: 100%;
  background-color: #f4f4f4;
}
.viewport {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 180rpx 0 0;
  position: relative;
}
.cover {
  width: 750rpx;
  height: 225rpx;
  border-radius: 0 0 40rpx 40rpx;
  overflow: hidden;
  position: absolute;
  left: 0;
  top: 0;
}
.scroll-view {
  flex: 1;
}
.tabs {
  display: flex;
  justify-content: space-evenly;
  height: 100rpx;
  line-height: 90rpx;
  margin: 0 20rpx;
  font-size: 28rpx;
  border-radius: 10rpx;
  box-shadow: 0 4rpx 5rpx rgba(200, 200, 200, 0.3);
  color: #333;
  background-color: #fff;
  position: relative;
  z-index: 9;
  .text {
    margin: 0 20rpx;
    position: relative;
  }
  .active {
    &::after {
      content: '';
      width: 40rpx;
      height: 4rpx;
      transform: translate(-50%);
      background-color: #27ba9b;
      position: absolute;
      left: 50%;
      bottom: 24rpx;
    }
  }
}
.goods {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 0 20rpx 20rpx;
  .navigator {
    width: 345rpx;
    padding: 20rpx;
    margin-top: 20rpx;
    border-radius: 10rpx;
    background-color: #fff;
  }
  .thumb {
    width: 305rpx;
    height: 305rpx;
  }
  .name {
    height: 88rpx;
    font-size: 26rpx;
  }
  .price {
    line-height: 1;
    color: #cf4444;
    font-size: 30rpx;
  }
  .symbol {
    font-size: 70%;
  }
  .decimal {
    font-size: 70%;
  }
}

.loading-text {
  text-align: center;
  font-size: 28rpx;
  color: #666;
  padding: 20rpx 0 50rpx;
}
</style>